Business Combinations, Intangibles and Goodwill - Additional Information (Details) (USD $)	6 Months Ended
	Jun. 30, 2012 Entity	Jun. 30, 2011
Business Acquisition [Line Items]
Businesses acquired (in number of entities)	8
Business acquisition, adjustment to fair value of previously held interests, recognized in other income	$ 31,599,000
Business acquisition, aggregate consideration for businesses	629,000,000
Cash consideration for acquisition of businesses	624,522,000	437,102,000
Stock options issued in business acquisitions	4,500,000
Consideration of acquisitions allocated to goodwill	508,200,000
Consideration of acquisitions allocated to intangibles	133,000,000
Consideration of acquisitions allocated to net liabilities	$ 12,200,000
EMC
Business Acquisition [Line Items]
Businesses acquired (in number of entities)	5
Acquisition By VMware
Business Acquisition [Line Items]
Businesses acquired (in number of entities)	3